Two rival factions, the Armagnacs and the Burgundians, vied for power within the regency council headed by the queen Isabeau of Bavaria.
It was overrun by the Armagnacs in 1444-1445 and endured twenty -five years later the presence of Peter of Hagenbach and his men.
The new Duke and Duchess of Bourbon then proceeded to add to these domains, adding Bourbon-Lancy in December 1488, and trading l'Isle-en-Jordain with the Armagnacs in June 1489 for Carlades and Murat.